[Domain Mapping] SSL setup not worked but domain mapping will not allow http

Cannot reset domain mapping to start again with SSL setup. Deactivated plugins to get back into admin area but as soon as I reactivate Domain Mapping the site looks for https.
Tried reinstalling plugin - no joy, do I need to also delete domain mapping form database or will this get me into another wold of pain.
So is there a simpler way to reset everything and reinstall SSL.
This is a multisite install and SSl in installed from hosting provider.